Pneumonia - weakened immune system

Definition

Pneumonia is a lung infection. It can be caused by many different germs, including bacteria, viruses, and fungi.

This article discusses pneumonia that occurs in a person who has a hard time fighting off infection because of problems with the immune system. This type of disease is called "pneumonia in an immunocompromised host."

Alternative Names

Causes

People whose immune system is not working well are less able to fight off germs. This makes them prone to infections from germs that do not often cause disease in healthy people. They are also more vulnerable to regular causes of pneumonia, which can affect anyone.

Exams and Tests

The doctor may hear crackles or other abnormal breath sounds when listening to your chest with a stethoscope. Lack of breath sounds key sign. This may mean there is a buildup of fluid between the chest wall and lung (pleural effusion).